Technical Performance Analysis of Circuit Breaker 1620-3-20A

In modern electrical systems, circuit breakers serve as crucial protective devices, playing a vital role. They not only manually control the opening and closing of circuits but also automatically cut off circuits in case of abnormal conditions such as overload or short circuit, thereby protecting power lines, electric motors, and other critical equipment from damage. Among the numerous circuit breaker models, 1620-3-20A stands out with its unique technical performance and wide range of applications. This article provides a detailed analysis of the technical performance of circuit breaker 1620-3-20A.

I. Basic Overview
Circuit breaker 1620-3-20A, manufactured by renowned E-T-A, belongs to its Automotive Circuit Breakers series. Specifically designed for automotive applications, this circuit breaker features thermal protection characteristics, enabling it to respond quickly and cut off the circuit when the current abnormally rises, thereby protecting the electrical system from damage. With a current rating of 20A and a voltage rating of 24VDC, it is suitable for DC circuits.

II. Technical Performance Analysis
Rated Current and Voltage
Circuit breaker 1620-3-20A has a rated current of 20A, meaning it can withstand a maximum operating current of 20A. Additionally, its voltage rating of 24VDC ensures stable operation in DC 24V circuits. These performance parameters make 1620-3-20A highly suitable for automotive electrical systems, especially those requiring high-current protection.

Thermal Protection Characteristics
This circuit breaker employs thermal protection principles, monitoring current levels by sensing heat changes in the circuit. When the current exceeds the rated value, the thermal element inside the circuit breaker rapidly heats up and triggers the protection mechanism, cutting off the circuit. This protection method is not only fast and effective but also reusable, reducing maintenance costs.

Structure and Dimensions
Circuit breaker 1620-3-20A features a compact design with a height of only 7mm, a length of 25mm, and a width of 13.3mm. This small size makes it easy to install and maintain, particularly suitable for automotive electrical systems with limited space. Additionally, its panel-mount style facilitates integration with other electrical devices within the vehicle.

Operating Temperature Range
The circuit breaker has a broad operating temperature range, with a minimum operating temperature of -40°C and a maximum operating temperature of +85°C. This performance parameter ensures stable operation of the circuit breaker under different climatic conditions, enhancing its reliability and durability.

Terminal Type and Actuator
Circuit breaker 1620-3-20A uses Blade terminal types, facilitating connection with other components in the circuit. Additionally, its actuator type is Button, making operation more straightforward and intuitive. This design not only improves the ease of use of the circuit breaker but also reduces the risk of accidental triggering during operation.

III. Application Fields and Advantages
Circuit breaker 1620-3-20A is widely used in automotive electrical systems, particularly for circuits requiring high-current protection, such as lighting systems, starter motors, heaters, etc. Its thermal protection characteristics ensure safe circuit disconnection in case of overload or short circuit, thereby protecting the stability and reliability of the automotive electrical system. Furthermore, the compact size and broad operating temperature range of this circuit breaker provide significant advantages in the automotive manufacturing sector.

IV. Conclusion
In summary, circuit breaker 1620-3-20A plays a crucial role in automotive electrical systems due to its unique technical performance and wide range of applications. Its rated current and voltage, thermal protection characteristics, structure and dimensions, operating temperature range, terminal type, and actuator performance parameters all excel, ensuring stable circuit operation and safety protection. With the continuous development and improvement of automotive electrical systems, the application prospects of circuit breaker 1620-3-20A will become even broader.

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